AJAX Intro

AJAX Request Build

AJAX Examples

Advantages or Disadvantages of AJAX


AJAX Advantages

AJAX Concept
Before you starting AJAX you'll need to have a strong knowledge of JavaScript. AJAX is not a difficult, you can easy implement AJAX in a meaningful manner. Some IDE are help us to implement AJAX.

Speed
Reduce the server traffic in both side request. Also reducing the time consuming on both side response.

Interaction
AJAX is much responsive, whole page(small amount of) data transfer at a time.

XMLHttpRequest
XMLHttpRequest has an important role in the Ajax web development technique. XMLHttpRequest is special JavaScript object that was designed by Microsoft. XMLHttpRequest object call as a asynchronous HTTP request to the Server for transferring data both side. It's used for making requests to the non-Ajax pages.

Asynchronous calls
AJAX make asynchronous calls to a web server. This means client browsers are avoid waiting for all data arrive before start the rendering.

Form Validation
This is the biggest advantage. Form are common element in web page. Validation should be instant and properly, AJAX gives you all of that, and more.

Bandwidth Usage
No require to completely reload page again. AJAX is improve the speed and performance. Fetching data from database and storing data into database perform background without reloading page.


AJAX Disadvantages

1. AJAX application would be a mistake because search engines would not be able to index an AJAX application.

2. Open Source: View source is allowed and anyone can view the code source written for AJAX.

3. ActiveX requests are enabled only in Internet Explorer and newer latest browser.

4 The last disadvantage, XMLHttpRequest object itself. For a security reason you can only use to access information from the web host that serves initial pages. If you need to fetching information from another server, it's is not possible with in the AJAX.